Hsu, I-Nan published the artcileDissociation constants of four disubstituted cinnamic acids, Safety of (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, the publication is Journal of the Indian Chemical Society (1967), 44(6), 540-1, database is CAplus.
The apparent pK values of trans-2,3-dimethoxycinnamic acid, trans-2,4-dimethoxycinnamic acid, trans-3,4-dimethoxycinnamic acid, and trans-3,5-dimethoxycinnamic acid were calculated at various concentrations, and extrapolation to a bulk concentration of 0 gives pK 4.37 ¡À 0.03, 4.80 ¡À 0.03, 4.53 ¡À 0.03, and 4.36 ¡À 0.003, resp. It is assumed that the activity coefficient of the undissociated acid is unity. Inductive and mesomeric effects are discussed.
Journal of the Indian Chemical Society published new progress about 16909-09-4. 16909-09-4 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Benzene,Ether, name is (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, and the molecular formula is C11H12O4, Safety of (E)-3-(2,4-Dimethoxyphenyl)acrylic acid.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia